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Biomedical subjects

R P Lusk

Publications and source records attributed to R P Lusk.

At least 19 recordsLinked to original sources
PubMed2001

The safety of conscious sedation in peritonsillar abscess drainage.

OBJECTIVE: To demonstrate the safety of conscious sedation in draining peritonsillar abscesses (PTAs). DESIGN: Children diagnosed as having a PTA in the pediatric emergency department were identified, and their medical records were retrospectively reviewed. Results of the present study were compared with those of a previous report. SETTING: A tertiary referral children's hospital pediatric emergency department. PARTICIPANTS: Ninety-one consecutive children initially evaluated in the emergency department and managed for a PTA. INTERVENTIONS: Peritonsillar abscess incision and drainage with or without sedation. A team of physicians whose activities were documented on a formal conscious-sedation record was present. Patients were monitored for major and minor complications. OUTCOME MEASURES: The primary outcome measures were major and minor complications. Secondary outcome measures were recurrence of PTA and the need for admission. RESULTS: There were 62 episodes of conscious sedation for drainage of a PTA. Among the 91 patients, 3 had a recurrence and 24 were admitted after the procedure. A previous study evaluated 30 episodes of conscious sedation for drainage of a PTA. No major complications occurred in either series. Combining the previous data with the present data produced 92 episodes of conscious sedation for drainage of a PTA. The 1-sided upper 95% confidence limit for the rate of major complications is 3.2%. CONCLUSION: Our series, when combined with previously published data, demonstrates that conscious sedation can be safely used when draining a PTA in pediatric patients.

Adolescent↗
PubMed2000

Update on the use of auricular cartilage in laryngotracheal reconstruction.

The pediatric otolaryngologist is often called upon to aid in the diagnosis and management of subglottic stenosis. This report contains an update of our experience using auricular cartilage in laryngotracheal reconstruction. A retrospective review of the medical records at St Louis Children's Hospital identified 43 children with subglottic stenosis. Thirty-one children were treated by use of auricular cartilage with a success rate of 84%, and an overall 94% success rate after revision surgery. Eight children in whom an anterior cricoid split initially failed were secondarily treated with auricular cartilage with a success rate of 75%. Two children initially treated with costochondral cartilage underwent multiple reconstructive procedures with either auricular cartilage or costochondral cartilage with an overall success rate of 50%. The remaining 2 children had long-segment tracheal stenosis and underwent repair with auricular cartilage with a 50% success rate. We find that auricular cartilage grafts are highly effective when used in a primary single-stage procedure in children with grade I or II stenosis. We have had limited success with auricular cartilage in patients with grade III stenosis and are reluctant to use it in grade IV stenosis, long-segment tracheal stenosis, staged reconstruction, or revision of an auricular or costal cartilage graft laryngotracheal reconstruction.

Adolescent↗
PubMed1999

Management of rhinosinusitis in children.

The authors provide definitions for the different forms of pediatric rhinosinusitis, with an enumeration of the main symptoms and signs. They also provide the indications for CT scan examination and microbiological investigations. In addition, they emphasize the importance of concomitant systemic disease, such as allergy and immunological disorders. The adequate medical management, which is mandatory before any surgery, is considered and discussed, and the indications for surgery are provided.

Child↗
PubMed1999

Conscious sedation: a new approach for peritonsillar abscess drainage in the pediatric population.

OBJECTIVE: To assess the safety and efficacy of conscious sedation (CS) in children undergoing emergency department incision and drainage (I&D) of peritonsillar abscesses (PTAs). DESIGN: A 33-month retrospective chart review of all children presenting to the emergency department with the diagnosis of a PTA or peritonsillar cellulitis. Children who underwent CS prior to I&D were compared with children without CS for complications and efficacy. SETTING: St Louis Children's Hospital, an academic tertiary care pediatric hospital. PATIENTS: Fifty-two children were enrolled; 30 PTAs were drained with CS in 27 children (3 underwent I&D twice), and 25 PTAs were drained in 25 children without CS. INTERVENTIONS: The CS team included an otolaryngologist, a pediatric emergency department physician, and a registered nurse. A standardized CS protocol assessing vital signs and level of consciousness was employed during each procedure. A combination of midazolam, ketamine hydrochloride, and glycopyrrolate was used in appropriately weighted calculated doses. Patients were assessed for major and minor airway complications. MAIN OUTCOME MEASURES: Airway complications related to CS were reviewed. Patients who underwent I&D with and without CS were compared with regard to purulent drainage. RESULTS: There were no major airway complications in patients undergoing I&D with CS. There was 1 minor complication in this group, oxygen desaturation to 88%, which resolved with stimulation. Of the 55 procedures, 45 (82%) yielded purulence: 29 (97%) of 30 in the CS group and 16 (64%) of 25 in the non-CS group (chi2 = 9.8; P = .002). Of those children undergoing CS, 3 (10%) of 30 were admitted to the hospital from the emergency department as compared with 6 (24%) of 25 without CS (chi2 = 1.95; P = .16). In the CS group, PTAs had a low recurrence rate of 1 (3.3%) of 30 compared with 2 (8%) of 25 in the non-CS group (chi2 = 0.57; P = .45). No one in the CS group required a secondary procedure under general anesthesia. CONCLUSIONS: This preliminary study demonstrates CS to be a potentially safe and efficacious approach to drainage of PTAs in children. Given its efficacy and its associated lower levels of anxiety and pain for the patient, CS seems to be a promising new approach to caring for children with PTAs.

Adolescent↗
PubMed1999

Maturation of the pediatric tracheostomy stoma: effect on complications.

The pediatric tracheostomy stoma can be matured via a technique that places 4-quadrant sutures from the tracheal cartilage to the dermis. This has the potential of decreasing the risk of accidental decannulation and the formation of granulation tissue. A retrospective analysis of 149 tracheostomies performed between January 1989 and December 1996 was done for the following factors: age, underlying diagnosis, indication for tracheostomy, type of tracheal incision, maturation of stoma, duration of tracheostomy, and early and late (>7 days) complications. Maturation of the stoma was performed in 88 (59.1%) of the 149 tracheostomies. There was an overall complication rate of 21.5% (32/149, not including granulation tissue formation). There were 9 (6.0%) early complications and 23 (15.4%) late complications. The overall incidence of tracheocutaneous fistulas occurred in 11 (11.2%) of the 98 decannulated patients: 6 (10.2%) of the 59 matured stomas and 5 (12.8%) of the 39 nonmatured stomas. Granulation tissue was found on subsequent laryngoscopy in 24 (27.3%) of the 88 matured stomas versus 23 (37.7%) of the 61 nonmatured stomas. There were no tracheostomy-related mortalities. Maturing the tracheostomy stoma resulted in a decreased morbidity from accidental decannulations and did not increase the incidence of tracheocutaneous fistulas or granulation tissue formation.

Adolescent↗
PubMed1998

Management of rhinosinusitis in children: consensus meeting, Brussels, Belgium, September 13, 1996.

OBJECTIVES: To (1) provide definitions for the different forms of pediatric rhinosinusitis, with an enumeration of the main symptoms and signs; (2) provide indications for microbiological, allergic, and immunologic assessment as well as for imaging studies; (3) suggest standard medical management with judicious use of antimicrobial agents; and (4) discuss indications for surgery. DATA SOURCES: Clinical studies and literature data relevant to the different topics of pediatric rhinosinusitis. CONCLUSIONS: Rhinosinusitis in children is a multifactorial disease in which the importance of several predisposing factors changes with increasing age. Continued study to obtain a better understanding of the disease and carefully controlled comparative evaluations of medical and surgical therapies are suggested.

Child, Preschool↗
PubMed1998

Cochlear implantation in children with inner ear malformations.

We performed a case study and intervention study, with follow-up of 1 to 5 years, in 4 children with inner ear malformations who underwent implantation of a multichannel cochlear implant (Nucleus, Cochlear Corporation) at ages 3 to 12 years. Malformations included a common cavity deformity, 2 incomplete partitions, and 1 case of isolated bilateral vestibular aqueduct enlargement. One child had a single-channel implant placed at 3 years of age, and this was exchanged for a 22-channel implant at age 9. One child had her implant placed at age 4.5 years, but due to complications from a cerebrospinal fluid (CSF) leak had the initial implant removed and replaced at age 5 years during repair of the CSF leak. Intraoperative findings included a CSF leak at the time of surgery in 3 patients. One patient contracted bacterial meningitis 7 months postimplantation that was thought to be secondary to acute otitis media in the unoperated ear. Bilateral CSF leaks were noted in the middle ear by a lumbar puncture radionuclide and fluorescein dye study. Successful repair of the CSF leaks and reimplantation of the cochlear implant was carried out in this patient. Mapping and programming of the implant was found to be challenging in each of these patients. All patients demonstrated improved performance after implantation. Two patients demonstrated some open-set speech perception. One patient demonstrates improved use of temporal cues in a structured closed set. One patient has achieved no significant speech recognition at this time, but does have improved sound detection and awareness. Cochlear implantation in children with congenital inner ear abnormalities can be a successful method of rehabilitation. It should be recognized that the postoperative speech perception results may be highly variable among patients, and that intraoperative complications may occur.

Cerebrospinal Fluid Otorrhea↗
PubMed1997

The bridging bronchus. Successful diagnosis and repair.

Anomalies of bronchial branching are infrequent and may be difficult to diagnose. The bridging bronchus is a rarely reported anomaly that may not be as sporadic as once thought. We describe an infant with respiratory distress whose right middle and lower lobes were supplied by a bridging bronchus arising from the left main bronchus. The airway anatomy was defined using flexible and rigid bronchoscopy and helical computed tomographic scanning, enabling successful surgical repair. We review current literature on the bridging bronchus as well as the possible embryological basis for this defect.

Bronchi↗
PubMed1997

Preoperative temporal bone computed tomography scan and its use in evaluating the pediatric cochlear implant candidate.

Preoperative computed tomography (CT) scan evaluation of the temporal bones in cochlear implant candidates plays a crucial role in determining candidacy and the side of implantation. The CT scans allow the surgeon to carefully review the anatomy of the inner ear and mastoid cavity in order to predict any potential difficulties or complications that may be encountered during the implant insertion. We retrospectively reviewed 50 preoperative CT scans of the temporal bone in children who have been successfully implanted. In these scans, we assessed the degree of mastoid pneumatization, cochlear anatomy and patency, size of the vestibular aqueduct, cochlear aqueduct, and internal auditory canal. We analyzed our findings and measurements and compared our results with the degree of difficulty noted in the insertion of the implant, the number of electrodes inserted in each case, and the overall complication rate. From this radiographic review, we have created a checklist for cochlear implant surgeons in order to highlight key features that need to be recognized in the temporal bone scan in preoperative evaluation of cochlear implant candidates.

Adolescent↗
PubMed1996

Anatomic variation in pediatric chronic sinusitis: a CT study.

The diagnosis of pediatric chronic sinusitis is problematic in very young children who have several of the symptoms consistent with chronic sinusitis. This article addresses only the issues surrounding the imaging, and particularly computed tomographic scanning, of chronic sinusitis in the pediatric population.

Adolescent↗
PubMed1995

Repair of long-segment tracheal stenosis in infancy.

Long-segment stenosis of the trachea in infancy is a considerable surgical challenge because the infants are generally extremely ill and the airway is small. The optimal type of repair is not clearly defined. This report summarizes our experience with rib cartilage tracheoplasty done with cardiopulmonary bypass. Six patients underwent repair of long-segment tracheal stenosis between September 1987 and September 1994. The mean age was 14 weeks (range 1 to 58 weeks). Patients had stenosis of at least 70% of the tracheal length, typically with complete cartilaginous rings. In all patients stenosis was repaired by placement of a section of rib cartilage as an augmentation patch into the anterior surface of the trachea, which had been incised through the entire length of the stenosis. To avoid distal airway intubation, we used cardiopulmonary bypass for all procedures, with a mean bypass duration of 110 minutes (range 54 to 175 minutes). Mechanical ventilation was required for a median of 11 days after the operation (range 7 to 81 days), and the median postoperative hospital stay was 17 days (range 12 to 180 days). All patients are long-term survivors. Complications included the need for extracorporeal membrane oxygenation to treat ventricular dysfunction in one patient and graft dehiscence requiring revision of the distal graft in another. The latter patient has required several treatments with a bronchoscope for removal of granulation tissue. All other patients are free of symptoms and have normal growth with a mean follow-up of 4.7 years (range 5 months to 7.6 years). We conclude that rib cartilage tracheoplasty for long-segment tracheal stenosis provides excellent results in short and intermediate follow-up. In addition, the use of cardiopulmonary bypass allows an unobstructed view of the tiny infant airway and thus permits a precise repair.

Cardiopulmonary Bypass↗
PubMed1995

Auricular cartilage versus costal cartilage as a grafting material in experimental laryngotracheal reconstruction.

Auricular cartilage has been used clinically as an alternative material to costal cartilage for implantation during laryngotracheal reconstructive surgery. Little information is available concerning the healing characteristics or the durability of these two types of graft. The authors of this study examined the rate of epithelialization and the survival of cartilage in a rabbit model of anterior tracheal wall reconstruction and directly compared auricular and costal cartilage grafts. Auricular cartilage was found to epithelialize faster than costal cartilage. Both types of graft survived well after implantation. The superior healing characteristics of auricular cartilage make it a desirable material for laryngotracheal reconstruction.

Animals↗
PubMed1994

Fasciaform myringoplasty in children.

OBJECTIVE: To evaluate the efficacy of fasciaform myringoplasty as a means to repair large tympanic membrane perforations in children. DESIGN: Retrospective review of the records of 26 patients who underwent 29 consecutive fasciaform myringoplasty surgeries over a 47-month period. Patients were followed up from 2 to 47 months postoperatively. SETTING: Academic tertiary care children's hospital. PARTICIPANTS: Twenty-six patients (5 to 16 years old), with tympanic membrane perforations (25% to 95%) underwent a fasciaform myringoplasty procedure. The perforations were caused by extrusion of ventilation tubes (83%), deep retraction pockets, trauma, or repair after resection of cholesteatoma. INTERVENTION: The surgery involves resection of the native tympanic membrane and annulus. A new tympanic membrane is formed from formaldehyde-fixed autogenous temporalis fascia and positioned. OUTCOME MEASURE: Successful repairs, complications, and audiometric evaluations were analyzed. Fisher's Exact Test was used to compare complication rates by age. RESULTS: Successful closure was accomplished in 69% of cases. Otitis media recurred in 52%. Ventilation tubes were reinserted in 24%; 28% resolved with antibiotics alone. When tubes were placed through the graft, small residual graft perforations resulted. Audiometric evaluation revealed improvement in pure tone average to less than a 20-dB hearing level in 77% and reduction of the air-bone gap to within a 20-dB hearing level in 90% of those cases (10/29) with complete audiometric data. CONCLUSIONS: Fasciaform myringoplasty has proven to be a successful procedure for closing large tympanic defects and improving hearing acuity in the pediatric population. However, recurrent otitis media and eustachian tube dysfunction may continue. Rates of reperforation were statistically significantly higher in children 7 years old and younger. Conservative management of children in this younger age group is warranted.

Adolescent↗
PubMed1994

Amyloidosis of the larynx in a child.

Localized laryngeal amyloidosis is a rare and benign process. Only three cases have been reported in children. We present the case of a 9-year-old girl with localized laryngeal amyloidosis that was excised via laryngofissure. The patient presented with a 3- to 4-week history of progressive hoarseness. Direct laryngoscopy revealed a smooth, firm, submucosal mass extending from the anterior aspect of the left false vocal cord to the vocal process. Biopsy of the mass revealed findings consistent with amyloidosis. The mass was approached via laryngofissure and excised with the thyroid cartilage and left true vocal cord left intact. An extensive workup for systemic amyloidosis was negative, including bone marrow biopsy. The postoperative recovery was uneventful, with good vocal quality and a sluggish but mobile left true vocal cord. This case is significant because of the young age of the child, the extent of disease, and the use of laryngofissure for excision.

Amyloidosis↗